Students can easily fall behind in their studies ____ they don’t manage their spare time carefully.

Students can easily fall behind in their studies ____ they don’t manage their spare time carefully.

1. A.
   though
2. B.
   if
3. C.
   since
4. D.
   until

Students can easily fall behind in their studies ____ they don’t manage their spare time carefully.

     A. though                    B. if                             C. since                        D. until

 Students can easily fall behind in their studies ____ they don’t manage their spare time carefully.

A. though                    B. if                             C. since                        D. until

Students can easily fall behind in their studies ____ they don’t manage their spare time carefully.